Baffling piece and tubular heat exchanger

Abstract

The invention belongs to the technical field of heat exchangers, and discloses a baffling piece and a tubular heat exchanger. The heat exchanger comprises two baffle plate sets, each baffle plate set comprises at least three baffle plates, and each baffle plate is provided with at least one tube bundle in a penetrating mode in the thickness direction; the rotating shaft is arranged on each baffle plate in the two baffle plate groups in a penetrating manner in the axial direction, and the rotating shaft can rotate around the axis of the rotating shaft so that the two baffle plate groups can be switched between the first working position and the second working position, and the baffle plates can be switched between the first working position and the second working position; the problem that the heat exchange efficiency of the tubular heat exchanger cannot be adjusted due to the fact that the distance between tube bundles cannot be changed in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchangers, and in particular to a baffle and a tubular heat exchanger. Background Art

[0002] As one of the most widely used heat exchange equipment in the industrial field, the core structure of the tubular heat exchanger consists of two major components: the shell and the tube bundle. The shell, as a pressure vessel, is usually designed in a cylindrical shape, with multiple groups of heat exchange tube bundles arranged in parallel inside, and the fluid separation between the tube side and the shell side is achieved through the tube sheet. Under normal operating conditions, the high-temperature fluid and the low-temperature fluid flow in the tube side and the shell side respectively in reverse, and the heat transfer and exchange is achieved through the heat conduction of the tube wall.

[0003] In the prior art, the tube bundles in the lower shell are usually fixed, and the arrangement of the tube bundles mostly adopts a regular triangle or square fixed array mode. Once the design is completed, the spacing between the tube bundles cannot be adjusted. If it is necessary to increase the turbulence intensity of the fluid to improve the heat exchange efficiency in certain applications, the tube spacing parameters are determined by precise calculations during the design phase, and then the tube bundles are permanently positioned by welding, expansion or tube sheet fixing. Although this rigid connection method ensures the mechanical stability of the structure, it also causes the tube spacing parameters to become non-adjustable fixed parameters. In actual industrial applications, when processing high-viscosity fluids (such as heavy crude oil) or when it is necessary to enhance heat transfer efficiency, it is usually necessary to increase the turbulence intensity of the shell-side fluid to destroy the laminar boundary layer. The fixed spacing between the tube bundles cannot change the turbulence intensity, resulting in a low heat exchange efficiency of the tubular heat exchanger, which cannot achieve the required heat exchange efficiency. Summary of the invention

[0004] The object of the present invention is to provide a baffle and a tubular heat exchanger to solve the problem in the prior art that the spacing between tube bundles cannot be changed, resulting in the inability to adjust the heat exchange efficiency of the tubular heat exchanger itself.

[0005] To achieve this object, the present invention adopts the following technical solution: The present invention provides a tubular heat exchanger, comprising: two baffle groups, each of which comprises at least three baffles, and each of which is penetrated by at least one tube bundle along the thickness direction;

[0006] A rotating shaft, the rotating shaft axially passing through each baffle in the two baffle groups, the rotating shaft being capable of rotating around its own axis to switch the two baffle groups between a first working position and a second working position;

[0007] When the two baffle groups are located at the first working position, along the axial direction of the rotation axis from one end of the two baffle groups close to the other end, the first spacing between each adjacent baffle increases gradually, and the spacing between any two adjacent baffles in each baffle group is the first spacing;

[0008] When the two baffle groups are located at the second working position, the second spacings between adjacent baffles along the axial direction of the rotating shaft are equal, and the second spacing is equal to the minimum value of the first spacing.

[0009] Preferably, the rotating shaft is fixedly provided with a first protrusion group, the first protrusion group includes at least three first protrusions arranged at equal intervals along the axial direction of the rotating shaft; each of the baffles is provided with a first spiral groove, and the central angle corresponding to each of the first spiral grooves is greater than 0° and less than 360°; at least three of the first protrusions are arranged in a one-to-one correspondence with at least three of the first spiral grooves, and the first protrusions are inserted into the first spiral grooves from bottom to top along the axial direction of the rotating shaft; during the rotation of the rotating shaft around its own central axis, the first protrusion slides relative to the first spiral groove along the extension direction of the first spiral groove;

[0010] The starting depth of each of the first spiral grooves is greater than the ending depth; along the axial direction of the rotating shaft from one end close to the other end of the two baffle groups, the protrusion height of each of the first protrusions gradually increases, the starting depth of each of the first spiral grooves gradually increases, and the depth change rate of each of the first spiral grooves along the extension direction gradually increases.

[0011] Preferably, the rotating shaft is also fixedly provided with a second protrusion group, the second protrusion group includes at least three second protrusions arranged at equal intervals along the axial direction of the rotating shaft; each of the baffles is provided with a second spiral groove, and the central angle corresponding to each of the second spiral grooves is greater than 0° and less than 360°; at least three of the second protrusions are arranged in a one-to-one correspondence with at least three of the second spiral grooves, and the second protrusions are inserted into the second spiral grooves from bottom to top along the axial direction of the rotating shaft; during the rotation of the rotating shaft around its own central axis, the second protrusion slides relative to the second spiral groove along the extension direction of the second spiral groove;

[0012] The end depth of each second spiral groove is greater than the starting depth; along the axial direction of the rotating shaft from one end close to the other end of the two baffle groups, the protrusion height of each second protrusion gradually increases, the end depth of each second spiral groove gradually increases, and the depth change rate of each second spiral groove along the extension direction gradually increases.

[0013] Preferably, the baffles include a baffle block and two wing plates, and the two wing plates are respectively connected to the two ends of the baffle block along the width direction; the number of the rotating shafts is two, and the two rotating shafts are correspondingly arranged in the two wing plates.

[0014] Preferably, the baffle is provided with a mounting hole extending through the axial direction of the rotating shaft, and the rotating shaft is passed through the mounting hole; or,

[0015] The baffle is provided with a mounting hole extending through the axial direction of the rotating shaft, a sliding sleeve is fixedly provided on the inner peripheral wall of the mounting hole, and the rotating shaft passes through the sliding sleeve; or,

[0016] The baffle is provided with a mounting hole which penetrates along the axial direction of the rotating shaft, and the outer peripheral wall fixing sleeve of the rotating shaft is provided with a sliding sleeve, and the sliding sleeve is at least partially located in the mounting hole.

[0017] Preferably, the tube bundle is U-shaped, and both ends of the tube bundle are used to pass through the baffle; or,

[0018] The tube bundle comprises an arc-shaped tube segment and a plurality of straight tube segments. Any two adjacent straight tube segments are connected via the arc-shaped tube segment to form a serpentine tube bundle. The plurality of straight tube segments are all passed through the baffle.

[0019] Preferably, the deflector further comprises a fixed driving member, an output end of the driving member is drivingly connected to the rotating shaft, and the driving member can drive the rotating shaft to rotate around its own central axis.

[0020] A tubular heat exchanger comprises a shell and a partition plate fixedly arranged in the shell, wherein the partition plate divides the chamber of the shell into a first chamber and a second chamber which are not connected to each other, and the shell is also provided with a first heat exchange inlet and a first heat exchange outlet which are connected to the first chamber, and a second heat exchange inlet and a second heat exchange outlet which are connected to the second chamber; the above-mentioned deflector is arranged in the first chamber, the inlet end of the tube bundle is connected to the second heat exchange inlet, and the outlet end of the tube bundle is connected to the second heat exchange outlet.

[0021] Preferably, the second chamber includes a first sub-chamber and a second sub-chamber, the first sub-chamber is provided with a second heat exchange inlet, the second sub-chamber is provided with a second heat exchange outlet, a flexible tube is provided on the partition plate, the tube bundle inlet is communicated with the first sub-chamber through the flexible tube, and the tube bundle outlet is communicated with the second sub-chamber through the flexible tube.

[0022] Preferably, the shell is cylindrical, and the axis of the shell is parallel to the horizontal plane;

[0023] And / or, the first heat exchange inlet is located at the top of the shell, and the first heat exchange outlet is located at the bottom of the shell;

[0024] And / or, the second heat exchange inlet is located at the top of the shell, and the second heat exchange outlet is located at the bottom of the shell.

[0025] Beneficial effect: The baffle plate group is switched between the first working position and the second working position by rotating the rotating shaft. When in the first working position, the gap between the baffles reaches the maximum, and when in the second working position, the spacing between the baffles is the smallest, and the spacing between the baffles is the same. Since the gap between the baffles changes, the turbulence intensity of the water flowing through the gap changes, and the thermal efficiency can be adjusted. If the gap between the baffles becomes larger when in the first working position, the resistance to the fluid will decrease, the turbulence effect will decrease, and the thermal efficiency will decrease. If the spacing between the tube bundles becomes smaller when in the second working position, the resistance to the fluid will increase, the turbulence effect will increase, and the thermal efficiency will increase. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a main body diagram of the tubular heat exchanger of the present invention;

[0027] Figure 2 This is a main diagram of the baffle shape member of the present invention;

[0028] Figure 3 It is the first bump matching diagram of the present invention;

[0029] Figure 4 It is the second bump matching diagram of the present invention.

[0030] In the figure: 1. tube bundle; 2. baffle; 21. first spiral groove; 22. second spiral groove; 23. baffle; 24. wing plate; 25. mounting hole; 3. rotating shaft; 4. first protrusion; 5. second protrusion; 7. shell; 71. first cavity; 73. first heat exchange inlet; 74. first heat exchange outlet; 75. second heat exchange inlet; 76. second heat exchange outlet; 8. partition plate; 9. sleeve. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0035] Under the existing technology, the tube bundle is generally installed in the shell of the tubular heat exchanger by permanent fixing in the form of welding, etc. The relative position between the tube bundles cannot be changed, and the position of the baffles will also be relatively fixed. When the liquid outside the tube bundle hits the baffles on the tube bundle, turbulence is formed. According to the laws of physics, the stronger the effect of the turbulence, the higher the thermal efficiency inside and outside the tube bundle will be. Since the gap between the upper and lower parts of the baffles cannot be changed, the intensity of the turbulence cannot be changed, and thus the heat exchange efficiency between the inside and outside of the tube bundle cannot be changed. If the medium fluid inside and outside the tube bundle changes and a different thermal efficiency is required, the existing tubular heat exchanger cannot be changed, resulting in the heat exchange temperature not meeting the requirements.

[0036] In order to solve the above problems, Figures 1 to 4 As shown, the present invention provides a baffle, which includes two baffle groups, which are arranged up and down, each baffle group includes at least three baffles 2, and each baffle 2 is penetrated by at least one tube bundle 1 along the thickness direction; a rotating shaft 3 is axially penetrated through each baffle 2 in the two baffle groups, and the rotating shaft 3 can rotate around its own axis to switch the two baffle groups back and forth between the first working position and the second working position.

[0037] When the two baffle groups are in the first working position, the first spacing between each adjacent baffle 2 gradually increases along the axial direction of the rotating shaft 3 from one end to the other end of the two baffle groups. The spacing between any two adjacent baffles 2 in each baffle group is the first spacing. The gap between adjacent baffles 2 at the first spacing can be increased. At this time, the resistance of the liquid between the baffles 2 at the first spacing is the smallest, and the turbulent effect formed will be minimized, thereby reducing the heat exchange efficiency.

[0038] When the two baffle groups are in the second working position, the second spacings between adjacent baffles 2 are equal along the axial direction of the rotating shaft 3, and the second spacing is equal to the minimum value of the first spacing. At this time, the spacing between the baffles 2 is the shortest, and the resistance of the liquid is the largest when passing through the second spacing, which will maximize the turbulent effect and thus improve the heat exchange efficiency.

[0039] The driving component on the outside of the tubular heat exchanger is usually a motor, and the output end of the motor is connected to the rotating shaft 3. The driving component can drive the rotating shaft 3 to rotate around its own central axis. When the rotating shaft 3 rotates back and forth, the baffle 2 can be switched between the first working position and the second working position to achieve thermal efficiency adjustment.

[0040] Embodiment 1

[0041] The rotating shaft 3 is fixedly provided with a first protrusion group, and the first protrusion group includes at least three first protrusions 4 arranged at equal intervals along the axial direction of the rotating shaft 3; each baffle 2 is provided with a first spiral groove 21, and the central angle corresponding to each first spiral groove 21 is greater than 0° and less than 360°; at least three first protrusions 4 are arranged in a one-to-one correspondence with at least three first spiral grooves 21, and the first protrusion 4 is inserted into the first spiral groove 21 from bottom to top along the axial direction of the rotating shaft 3; during the rotation of the rotating shaft 3 around its own central axis, the first protrusion 4 slides relative to the first spiral groove 21 along the extension direction of the first spiral groove 21.

[0042] The starting depth of each first spiral groove 21 is greater than the ending depth; along the axial direction of the rotating shaft 3 from one end close to the other end of the two baffle groups, the protrusion height of each first protrusion 4 gradually increases, the starting depth of each first spiral groove 21 gradually increases, and the depth change rate of each first spiral groove 21 along the extension direction gradually increases.

[0043] When the rotating shaft 3 rotates to switch the baffle 2 from the second working position to the first working position, the first protrusion 4 will rotate toward the shallow side of the first spiral groove 21, and the first protrusion 4 will gradually lift the baffle 2 to move the baffle 2 upward. As the distance from the two baffle groups increases, the depth of the first protrusion 4 and the first spiral groove 21 matched therewith increases, and the distance between each baffle 2 increases, so that the resistance of the liquid passing through the above-mentioned gap will be smaller, thereby making the heat exchange efficiency lower.

[0044] The rotating shaft 3 is also fixed with a second convex block group, which includes at least three second convex blocks 5 arranged at equal intervals along the axial direction of the rotating shaft 3; each baffle 2 is provided with a second spiral groove 22, and the central angle corresponding to each second spiral groove 22 is greater than 0° and less than 360°; at least three second convex blocks 5 are arranged in a one-to-one correspondence with at least three second spiral grooves 22, and the second convex blocks 5 are inserted into the second spiral grooves 22 from bottom to top along the axial direction of the rotating shaft 3; during the rotation of the rotating shaft 3 around its own central axis, the second convex blocks 5 slide relative to the second spiral groove 22 along the extension direction of the second spiral groove 22;

[0045] The end depth of each second spiral groove 22 is greater than the starting depth; along the axial direction of the rotating shaft 3 from one end close to the other end of the two baffle groups, the protrusion height of each second protrusion 5 gradually increases, the end depth of each second spiral groove 22 gradually increases, and the depth change rate of each second spiral groove 22 along the extension direction gradually increases.

[0046] When the rotating shaft 3 rotates to switch the baffle 2 from the second working position to the first working position, the second protrusion 5 will rotate toward the deep side of the second spiral groove 22, and the baffle 2 will gradually be inserted into the second protrusion 5, so that the baffle 2 moves downward. As the distance from the two baffle groups increases, the depth of the second protrusion 5 and the second spiral groove 22 matched therewith increases, and the distance between each baffle 2 increases, so that the resistance of the liquid passing through the above-mentioned gap will be smaller, thereby making the heat exchange efficiency lower.

[0047] When the rotating shaft 3 drives the baffle plate 2 to switch from the first working position to the second working position, the baffle plates 2 in the baffle groups on the upper and lower sides simultaneously approach the middle, and finally the gap between each baffle plate 2 is the second spacing. In the second spacing state, the fluid resistance flowing through the baffle plate group becomes larger and larger, thereby improving the heat exchange efficiency.

[0048] The baffle 2 of the present invention includes a baffle block 23 and two wing plates 24. The baffle block 23 can block the flow of water. The two wing plates 24 are respectively connected to the two ends of the baffle block 23 along the width direction. There are two rotating shafts 3, and the two rotating shafts 3 are correspondingly passed through the two wing plates 24. By installing rotating shafts 3 on the wing plates 24 on both sides, both sides of the baffle 2 can be fixed, making the movement process of the baffle 2 more stable.

[0049] The baffle plate 2 is provided with a mounting hole 25 extending through the axial direction of the rotating shaft 3, the rotating shaft 3 is inserted into the mounting hole 25, or a sliding sleeve 9 is sleeved in the mounting hole 25, and the rotating shaft 3 is inserted into the sliding sleeve 9, or the baffle plate 2 is provided with a mounting hole 25 extending through the axial direction of the rotating shaft 3, and a sliding sleeve 9 is fixedly sleeved on the outer peripheral wall of the rotating shaft 3, and the sliding sleeve 9 is at least partially located in the mounting hole 25. By installing the sliding sleeve 9 between the rotating shaft 3 and the mounting hole 25, the friction force of the rotating shaft 3 during the rotation process can be reduced.

[0050] The tube bundle 1 of the present invention may be U-shaped, with both ends of the tube bundle 1 being used to pass through the baffle 2, both ends of the tube bundle 1 being connected to flexible pipes and being led out to the outside through the flexible pipes, or the tube bundle 1 may include an arc-shaped tube segment and a plurality of straight tube segments, any two adjacent straight tube segments are connected through the arc-shaped tube segment to form a serpentine tube bundle 1, and the plurality of straight tube segments are all passed through the baffle 2, and finally both ends of the tube bundle 1 are connected to the pipelines of the outside through the flexible pipes.

[0051] The tubular heat exchanger includes a shell 7 and a partition plate 8 fixedly arranged in the shell 7. The partition plate 8 divides the chamber of the shell 7 into a first chamber 71 and a second chamber that are not connected to each other. The shell 7 is also provided with a first heat exchange inlet 73 and a first heat exchange outlet 74 that are connected to the first chamber 71, and a second heat exchange inlet 75 and a second heat exchange outlet 76 that are connected to the second chamber. The baffle is arranged in the first chamber 71. The inlet end of the tube bundle 1 is connected to the second heat exchange inlet 75, and the outlet end of the tube bundle 1 is connected to the second heat exchange outlet 76. The liquid entering the first heat exchange inlet 73 exchanges heat with the liquid in the tube bundle 1 through the turbulent effect, and then is discharged from the first heat exchange outlet 74. A first sub-chamber and a second sub-chamber are formed in the second chamber. The inlet end of the tube bundle 1 is connected to the first sub-chamber, and the outlet end of the tube bundle 1 is connected to the second sub-chamber. After that, the first sub-chamber and the second sub-chamber are independently connected to the outside world. The second sub-chamber discharges the liquid in the tube bundle 1, and the first sub-chamber can introduce new liquid into the tube bundle 1.

[0052] The second cavity includes a first sub-cavity and a second sub-cavity, a second heat exchange inlet 75 is installed on the first sub-cavity, a second heat exchange outlet 76 is installed on the second sub-cavity, a flexible tube is installed on the partition plate 8, the inlet of the tube bundle 1 is connected with the first sub-cavity through the flexible tube, and the outlet of the tube bundle 1 is connected with the second sub-cavity through the flexible tube, so that the tube bundle 1 in the first cavity 71 can move independently, the flexible tube can adapt to the up and down movement of the tube bundle 1, and the liquid in the tube bundle 1 can be input and output in the flexible tube.

[0053] The shell 7 of the present invention is cylindrical, and the shell 7 is placed on a horizontal plane, and the axis of the shell 7 is parallel to the horizontal plane, wherein the first heat exchange inlet 73 is at the top and the first heat exchange outlet 74 is at the bottom, and the liquid in the first chamber 71 flows downward naturally by gravity. Similarly, the second heat exchange inlet 75 is also at the top of the shell 7, and the second heat exchange outlet 76 is installed at the bottom of the shell 7, and the flow of the liquid in the tube bundle 1 is guided by gravity.

[0054] Temperature sensors, pressure sensors and flow sensors are installed on the first heat exchange inlet 73, the first heat exchange outlet 74, the second heat exchange inlet 75 and the second heat exchange outlet 76. The temperature sensor is electrically connected to the motor. The temperature of the liquid in the tube bundle 1 and the first cavity 71 is monitored by the temperature sensor and fed back to the controller. The motor is controlled to rotate clockwise or counterclockwise to adjust the position of the baffle to achieve a change in thermal efficiency. The pressure sensor and the flow sensor can detect the flow and pressure data inside the delivery pipe at all times, so that the user can monitor the flow and pressure data through the human-computer interaction interface.

[0055] The present invention also provides a control system for a heat exchanger with adjustable heat exchange efficiency, comprising the following modules:

[0056] Hardware installation and debugging module: Install temperature, pressure and flow sensors, and connect them to the central control unit, install the drive motor and rotating shaft 3, and ensure that they fit tightly with the baffle group.

[0057] Software development and debugging module: Develop the control algorithm of the central control unit and integrate it with the sensor module, drive module and human-machine interface (HMI); perform system debugging to ensure the coordination and accuracy between sensor data acquisition, control logic operation and drive module action.

[0058] System Testing and Optimization Module: Conducts comprehensive system testing, including the control performance of baffle assembly expansion and contraction under different operating conditions, optimizes control algorithms and hardware configurations based on test results, and ensures that the system can operate stably and efficiently in actual applications.

[0059] Through this design of control system, the tubular heat exchanger can realize real-time dynamic adjustment of the baffle group, thereby optimizing the heat exchange efficiency and adapting to different working conditions and operating requirements. This control system combines the integration of sensor monitoring, intelligent algorithms and mechanical drives.

[0060] Embodiment 2

[0061] The rotating shaft of the present invention can also be provided with external threads of different rotation directions, and the baffle is provided with threaded holes. At the same time, the thread pitch is smallest on the side close to the two baffle groups, and the thread pitch is largest away from the gap between the two baffle groups. In this way, the outer baffle can be moved a farther distance. When switching from the second working position to the first working position, the farther the two baffle groups are from each other, the larger the gap between adjacent baffles will be, so that the gap between each baffle can be expanded.

[0062] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A baffle, characterized in that: include: Two baffle groups, each of the baffle groups comprising at least three baffles (2), and each of the baffles (2) being provided with at least one tube bundle (1) along the thickness direction; A rotating shaft (3), the rotating shaft (3) being axially disposed through each baffle plate (2) in the two baffle plate groups, the rotating shaft (3) being capable of rotating around its own axis to switch the two baffle plate groups between a first working position and a second working position; When the two baffle groups are located at the first working position, along the axial direction of the rotating shaft (3) from one end of the two baffle groups close to each other to the other end, the first spacing between each adjacent baffle (2) gradually increases, and the spacing between any two adjacent baffles (2) in each baffle group is the first spacing; When the two baffle groups are located at the second working position, the second spacings between adjacent baffles (2) along the axial direction of the rotation axis (3) are equal, and the second spacing is equal to the minimum value of the first spacing.

2. The deflector according to claim 1, characterized in that The rotating shaft (3) is fixedly provided with a first protrusion group, the first protrusion group comprising at least three first protrusions (4) arranged at equal intervals along the axial direction of the rotating shaft (3); each of the baffles (2) is provided with a first spiral groove (21), and the central angle corresponding to each of the first spiral grooves (21) is greater than 0° and less than 360°; at least three of the first protrusions (4) are arranged in a one-to-one correspondence with at least three of the first spiral grooves (21), and the first protrusions (4) are inserted into the first spiral grooves (21) from bottom to top along the axial direction of the rotating shaft (3); during the rotation of the rotating shaft (3) around its own central axis, the first protrusions (4) slide relative to the first spiral groove (21) along the extension direction of the first spiral groove (21); The depth at the starting point of each first spiral groove (21) is greater than the depth at the ending point; along the axial direction of the rotating shaft (3) from one end close to the other end of the two baffle groups, the protrusion height of each first protrusion (4) gradually increases, the depth at the starting point of each first spiral groove (21) gradually increases, and the depth change rate of each first spiral groove (21) along the extension direction gradually increases.

3. The deflector according to claim 1, characterized in that The rotating shaft (3) is also fixedly provided with a second convex block group, the second convex block group comprises at least three second convex blocks (5) arranged at equal intervals along the axial direction of the rotating shaft (3); each of the baffle plates (2) is provided with a second spiral groove (22), and the central angle corresponding to each of the second spiral grooves (22) is greater than 0° and less than 360°; at least three of the second convex blocks (5) are arranged in a one-to-one correspondence with at least three of the second spiral grooves (22), and the second convex blocks (5) are inserted into the second spiral grooves (22) from bottom to top along the axial direction of the rotating shaft (3); during the rotation of the rotating shaft (3) around its own central axis, the second convex blocks (5) slide relative to the second spiral groove (22) along the extension direction of the second spiral groove (22); The end depth of each second spiral groove (22) is greater than the starting depth; along the axial direction of the rotating shaft (3) from one end close to the other end of the two baffle groups, the protrusion height of each second protrusion (5) gradually increases, the end depth of each second spiral groove (22) gradually increases, and the depth change rate of each second spiral groove (22) along the extension direction gradually increases.

4. The deflector according to any one of claims 1 to 3, characterized in that: The baffles (2) each comprise a baffle block (23) and two wing plates (24), wherein the two wing plates (24) are respectively connected to two ends of the baffle block (23) along the width direction; the number of the rotating shafts (3) is two, and the two rotating shafts (3) are respectively arranged through the two wing plates (24).

5. The deflector according to any one of claims 1 to 3, characterized in that: The baffle plate (2) is provided with a mounting hole (25) penetrating along the axial direction of the rotating shaft (3), and the rotating shaft (3) is inserted into the mounting hole (25); or, The baffle plate (2) is provided with a mounting hole (25) which penetrates along the axial direction of the rotating shaft (3); a sliding sleeve (9) is fixedly provided on the inner peripheral wall of the mounting hole (25); and the rotating shaft (3) is passed through the sliding sleeve (9); or, The baffle plate (2) is provided with a mounting hole (25) which penetrates along the axial direction of the rotating shaft (3); the outer peripheral wall fixing sleeve of the rotating shaft (3) is provided with a sliding sleeve (9); and the sliding sleeve (9) is at least partially located in the mounting hole (25).

6. The deflector according to any one of claims 1 to 3, characterized in that: The tube bundle (1) is U-shaped, and both ends of the tube bundle (1) are used to pass through the baffle (2); or, The tube bundle (1) comprises an arc-shaped tube segment and a plurality of straight tube segments, any two adjacent straight tube segments are connected via the arc-shaped tube segment to form a serpentine tube bundle (1), and the plurality of straight tube segments are all disposed through the baffle (2).

7. The deflector according to any one of claims 1 to 3, characterized in that: The deflector also comprises a fixedly arranged driving member, the output end of which is in transmission connection with the rotating shaft (3), and the driving member can drive the rotating shaft (3) to rotate around its own central axis.

8. A tubular heat exchanger, comprising a shell (7) and a partition plate (8) fixedly arranged in the shell (7), wherein the partition plate (8) divides the chamber of the shell (7) into a first chamber (71) and a second chamber which are not connected to each other, and the shell (7) is further provided with a first heat exchange inlet (73) and a first heat exchange outlet (74) which are connected to the first chamber (71), and a second heat exchange inlet (75) and a second heat exchange outlet (76) which are connected to the second chamber; characterized in that: The deflector described in any one of claims 1 to 7 is arranged in the first cavity (71), the inlet end of the tube bundle (1) is connected to the second heat exchange inlet (75), and the outlet end of the tube bundle (1) is connected to the second heat exchange outlet (76).

9. The tubular heat exchanger according to claim 8, characterized in that: The second chamber comprises a first sub-chamber and a second sub-chamber, the first sub-chamber is provided with a second heat exchange inlet (75), the second sub-chamber is provided with a second heat exchange outlet (76), the partition plate (8) is provided with a flexible tube, the tube bundle (1) inlet is connected to the first sub-chamber via the flexible tube, and the tube bundle (1) outlet is connected to the second sub-chamber via the flexible tube.

10. The tubular heat exchanger according to claim 8, characterized in that: The shell (7) is cylindrical, and the axis of the shell (7) is parallel to the horizontal plane; And / or, the first heat exchange inlet (73) is located at the top of the shell (7), and the first heat exchange outlet (74) is located at the bottom of the shell (7); And / or, the second heat exchange inlet (75) is located at the top of the shell (7), and the second heat exchange outlet (76) is located at the bottom of the shell (7).

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